WO2019228584A1

WO2019228584A1 - Electrical drive unit for motor-vehicle applications

Info

Publication number: WO2019228584A1
Application number: PCT/DE2019/100361
Authority: WO
Inventors: Winfried Schlabs; Claus Töpfer; Tim SONNENSCHEIN
Original assignee: Kiekert Ag
Priority date: 2018-05-30
Filing date: 2019-04-18
Publication date: 2019-12-05
Also published as: EP3803156A1; DE102018112900A1

Abstract

The subject matter of the invention is an electrical drive unit (1) for motor-vehicle applications, having a housing (4) comprising a housing shell (5) and at least one housing cover, an electric motor (8), wherein the electric motor (8) is accommodated in the housing (4), at least one transmission unit (7) which is in engagement with the motor (8), wherein a drive component, in particular a Bowden cable, can be moved by means of the transmission unit (7), and an electrical contact-making arrangement for the motor, wherein the electrical contact-making arrangement can be designed as a flexible conductor track structure (9), so that a relative movement (P) between the motor (8) and the housing (4) can be compensated.

Description

Electric drive unit for automotive applications

The invention relates to an electric drive unit for automotive applications, in particular ei nen Zuziehantrieb for a motor vehicle lock, aufwei send a housing of a housing shell and at least one housing cover, an electric motor, wherein the Elekt romotor is accommodated in the housing, at least one with the motor engaged Gear unit, wherein by means of the gear unit, a drive component, in particular a Bowden cable, is movable and an electrical cal contacting for the engine.

In today's motor vehicles, more and more electrical cal components and electronic control units are ver builds. These components can serve to increase functionality, to ensure the safety in the motor vehicle and / or to determine a positioning of components of the motor vehicle to single Lich to give a few examples. With respect to Schließsys systems, such as motor vehicle repairers, electric cal drives for sliding doors and / or supporting components such as a Zuziehantrieb for a locking system, the electrical components for He Constitution of positions and / or be installed for a functionality. For example, if switching means or electric drives, preferably DC motors, used in the components of the motor vehicle, an electrical contact is necessary. The electric Contacting takes place mostly via conductor tracks, which are installed in a housing of the locking system or drive and usually end in a housing socket for electrical contacting with a plug. The housing of the locking systems or drives are used to hold the electrical components, so that the housin components are also denominated as a component carrier.

A structure of such a component carrier is shown for example in EP 1 231 824 A2. There is described ei ne track unit, which can be fitted with components be. Examples of such components are connectors, micro-switches, sensors, motors, etc., which are used in a door lock unit of a motor vehicle. The conductor track unit consists essentially of a flexible printed circuit film, which is injected by two stiffening elements to a module made of plastic. For the attachment of the listed components, the module can still be provided with a separate recording in the context of encapsulation. With such a conductor track unit, it is possible in motor vehicle door locks to provide a relatively rigid or dimensionally stable component carrier, with which secure positioning of the components with respect to the motor vehicle lock can be ensured.

Another way of contacting electrical components in a motor vehicle door lock is known from the example in DE 10 2009 053 384 Al. The contacting of the electrical components, such as For example, electric motor or micro-switch, takes place via a conductor foil. The conductor foil is integrated into the surface, wherein, for example, the conductor foil is punched out of a metal foil and impressed under the simultaneous application of pressure and heat into the plastic carrier. By this method, the conductor film immersed in the plastic substrate upper surface side and at least slightly, with a correspondingly plasticized and displaced Kunststoffmas se ensures that the conductor film is optionally sealed by the previously molten plastic.

DE 10 2006 017 830 A1 describes a multi-part electron component carrier for use in a motor vehicle lock. An electrical connection means in the form of a plug is connected via conductor tracks to a first component carrier, wherein the component can tenträger for example for receiving electrical compo le, such as an electric motor or a Mik roschalter can serve. To the first component carrier, a second component carrier can be added, which in turn includes electrical components. These electrical components of the second component carrier are contacted with conductor tracks which are connected to the conductor tracks of the first component carrier, for example welded or with a frictional connection. These interconnects are positioned in a recess which extends from the second component carrier to the first component carrier, so that the recess can be sealed at closing nor to protect the interconnects from moisture keits with a filler. From the known prior art are always fixed Kon taktierungen of the electrical components with the compo nententräger already known. Now it can come due to dynamic forces between an electric motor and the electric motor downstream gear stage to movements of the motor in the electric component carrier or in a housing receiving the electric motor. The known solutions offer only limited solutions to provide a secure and cost-effective contacting of the electromobility sector with the Elektrokomponententräger. This is where the invention starts.

The object of the invention is to provide a motor vehicle lock or a drive unit for motor vehicle technical applications, which provides an improved Kontak orientation of the electrical components and preferably the electric motor. In addition, it is an object of the invention to provide a cost-effective, production-enhancing and safe contacting for the electrical components.

The object is achieved by the features of the independent claim 1. Advantageous Ausgestaltun conditions of the invention are specified in the dependent claims. It should be noted that the embodiments described below are not limiting, but any variation possibilities of the features described in the description and the dependent claims are possible. According to claim 1, the object of the invention is achieved in that an electric drive unit for motor vehicle applications, in particular a zuziehantrieb for a motor vehicle lock is provided, comprising a locking mechanism of a housing shell and at least one housing cover, an electric motor, wherein the electric motor received in the housing is, at least one and with the engine engaged Getriebeein unit, wherein by means of the gear unit a Antriebskom component, in particular a Bowden cable, is movable and ei ne electrical contact for the engine, the electrical contact as a flexible Leiterbahngebil det can be formed, so that a relative movement between the motor and the housing is compensated. By he inventive design of the electric drive unit, the possibility is now created to attach the electric motor fle xibel to the conductor formed, wherein the conductor track structure is able to follow a relative movement of the motor.

The relative movement of the motor results from the interaction menspiel of the electric motor with the output shaft, in which, for example by means of a worm or a gear, a force in the motor can be introduced. This force causes the electric motor to move in the housing. Although a rigid recording of the electric motor or the housing of the electric motor is in principle conceivable, but causes the motor shaft is exposed to heavy loads. An armature winding or the interaction between the armature winding and the rotor winding causes a play in the rotor, which via the output shaft of a Ab- is exposed to driving force. Advantageously, the motor housing can be resilient, that is, for example, in egg ner plastic bearing, added and the motor axis or the rotor also has an axial clearance compensation, which is compensated for example by flexible on proposals. Ultimately, the necessary clearance that drives the rotor shaft or the output shaft in loading leads to the fact that there is a relative movement between the motor housing and lock housing. In front of advantageous manner, the flexible strip structure can follow the relative movements between the motor housing and Schlossgehäu se. It is assumed that the motor contacts are located in the motor housing.

As electrical drive unit for motor vehicle technical cal applications locking systems, Zuziehantriebe or, for example, interlocks can be considered. However, this is not restrictive, but should only be considered as an example of where the flexible conductor connection can be used. As Zuziehantrieb the electric drive unit is used when by means of the motor and a downstream gear stage, a locking of a Gespers a closing device by means of the electric drive unit to executable. The tightening takes place with respect to the locking mechanism in such a way that a locking unit located in a pre-restraint converts the electric drive unit into the locking position into a main locking position. The locking mechanism is part of a Schließein direction or a motor vehicle lock. The drive unit has a mostly plastic BE standing housing. The housing comprises a housing shell, and at least one housing cover. The motor of the drive unit is at least partially inserted into the Ge housing shell, so that positioning of the output shaft with respect to a downstream transmission is possible. Preferably, the motor is fixed in the housing shell by means of the housing cover. In this case, additional damping means can be used, which allow an at least partially elastic storage of Mo tor.

The motor is electrically contacted by means of the conductor track structure. The electrical contacting is thus effected via a conductor track structure accommodated in the housing, where the printed conductor track may be made of the usual materials. The conductor track structure is flexible in each case to the extent that the dynamic relative movements between the housing and motor followed who can. For this purpose, the conductor track structure is at least be richly free between motor contacting and electrical shear contact led in the housing.

In a preferred embodiment, the conductor track structure by means of the housing and at least partially durable and / or feasible. By positioning the strip conductor in the housing by means of holders and / or guides, a short-circuit-proof contacting of the motor can be ensured. Brackets can safely align the track structure so that shocks or pulses that act on the motor vehicle do not Influence on the positioning of the conductor track structure exercise. The conductor track formation can be held on the one hand and on the other hand be guided in a positionally secure manner through the housing. A position-secure guide prevents the printed circuit board from coming into contact with adjacent further components of the drive unit.

If the interconnect structure directly bindable ver with the engine, then there is a further Ausgestaltungsvari ante of the invention. Due to the direct contacting of the strip conductor structure, there is the possibility that the strip conductor structure can follow the movement of the motor immediately. In a relative movement between the motor and housing, the conductor track structure is thus firmly connected to the motor housing, so that a relative movement between rule motor and housing leads to a movement of the printed circuit formed. The movement of the motor is transmitted to the Lei terbahngebilde. The firm contact of the conductor track structure with the motor housing forms a firm receptacle for the conductor track structure.

Now, if the interconnect structure by means of a formschlüssi gene compound, in particular by means of terminal contacts connectable to a terminal conductor, so in vorteilhaf ter way introduced into the interconnect structure BEWE tion, be transmitted via the fixed connection of the interconnect to the motor, in the interconnect structure. The positive connection of the strip conductor structure with clamping contacts arranged in the drive unit forms the second fixed receptacle for the strip conductor formation. The trace formation is thus one-sided fixed to the engine and on the other hand firmly connected to the positive connection. The positive connection also offers the advantage that on a soldering process for Anbin tion of the conductor track structure to the electric drive unit is dispensed with. Forms the positive Ver bond and in particular the terminal contacts, a solid connection for the conductor track structure and the conductor track structure also firmly to the motor housing verbun the, so a relative movement between the motor and Ge housing can be taken on the trace formation. The trace formation thus allows flexible electrical contacting for the motor.

It may also be advantageous if the conductor formed at least partially with plastic sheath bar. On the one hand, the engine may be included in a damping plastic, but it is also possible, the conductor track structure at least area, with plastic to encase, so that, for example, an assembly of the conductor track structure is easier. In addition, the plastic jacket can serve as Dämp fungsmittel for engine mounting. By plastic coating thus a secure guiding and / or holding the conductor track structure in the drive unit can be achieved. In this case, the plastic casing but in any case designed such that a BEWE movement of the conductor track structure is possible, whereby the relative movements between the motor and housing can be compensated. The plastic sheath can also be used where the conductor tracks of the conductor track formation safely are to be led, so that a short-circuit-proof Kontak tion of the engine is possible.

In a further embodiment variant of the invention, the conductor track formation has a plastic casing, wherein an engine mount can be formed at least in regions by means of the plastic casing. The Mo tor is held between the housing shell and at least one housing cover part in the drive unit. The forcibly occurring during operation of the engine Schwingun conditions and movements on the one hand lead to relative movements between the engine and housing and on the other hand can cause noise cal. By means of a plastic bearing and in particular a bearing in a rubber-elastic plastic, a low-noise intake of the motor in the housing can be achieved. On the one hand can be accommodated with the Kunststoffum sheath the motor in an advantageous manner in the housing and on the other hand, the web-shaped integrally formed on the plastic sheath a lagesi chere positioning of the conductor track structure in the housing allow. In addition, the assembly of the conductor track structure is simplified. According to the invention, therefore, a secure electrical contacting of the motor made light and at the same time a means for simplified Mon days of the drive unit provided.

In a further embodiment variant of the invention, the conductor track formation has at least one free loop. In this case, a free loop means that the conductor track structure is shaped in such a way that at least one radiused housing, which is accommodated freely in the housing, is formed. is formed rich in the trace formation. A connec tion of the conductor track structure with, for example, Steckkontak th in the housing is thus indirectly via at least one free loop, that is, deflection of the conductor track. This free loop high flexibility of the strip conductor structure can be achieved. If the conductor track structure on the one hand firmly connected to the terminal contacts and on the other hand fixed to the motor, it can be provided on the free loop or the exposed deflection of the conductor track a permanently elastic contacting of the motor. The loop is able to se the relative movements between the engine and hous se se sure and permanently stable. Of course, it is also conceivable that more than one loop fe, that is, two, three or more loops, as well as, for example, wave contours are formed in the trace formation.

In a further advantageous embodiment variant, a force in the Mo tor can be introduced by means of the conductor track structure, so that a stabilization of the position of the motor is possible. Advantageously, the conductor track structure can serve to stabilize the position of the motor. The conductor track structure thus has another function, namely that the relative movement of the motor is counteracted by a force. The trace structure can on the one hand support the engine mount and on the other hand initiate an additional force component in the engine, which stabili the position of the motor in the housing stabili. The force of the conductor track structure can counteract a solid bearing side of the engine. Is the model Tor unilaterally, for example, absorbed in a damping means, with a game or a relative movement of the engine out of the fixed area of the storage he follows, the conductor track formation can act on the engine in the La gerstelle in with a force. The Be aufschlagung the force of the conductor track structure then counteracts the movement of the motor in the housing.

Furthermore, it may be advantageous if the conductor track structure can be formed as a stamped grid. The formation of the printed circuit board as a punched grid offers a cost-effective way to produce a Kontaktie tion of the motor in the drive unit. Punching grids are inexpensive and easy to manufacture and can be formed from the usual materials for electrical contacting in drive units. Advantageously, the stamped grid is made of the material with which the printed conductor formed in the housing via the Klemmkon timing is connectable.

In a further embodiment variant of the invention, the motor with a spindle drive in Wirkverbin training. The output shaft of the engine may include a worm meshing with a worm wheel. The wedge wheel in turn can be formed integrally with a spindle and, for example, be as a plastic component Herge. On the spindle itself a Spindelmut ter be feasible, which in turn ver is connected to a Bowden cable. By the engine is then on the gear stage and the spindle, the spindle nut operable and thus the Bowden cable operable. The at the operation the forces occurring in the Bowden lead to Relativbewe conditions of the engine or the motor shaft and / or the motor housing. These movements can be accommodated by means of the conductor track and in addition, the conductor track formation can advantageously counteract a relative movement of the motor. It is thus a kos ting, production-enhancing and safe Kontaktie tion of the engine by the conductor track achievable.

The invention will be explained in more detail with reference to the accompanying drawings based on a preferred Ausfüh approximately example. However, it is the basic proposition that the embodiment does not limit the invention, but merely represents an embodiment. The illustrated features may be performed individually or in combination with other features of the specification as well as the claims individually or in combination.

It shows:

Figure 1 is a three-dimensional view of an electric drive unit for automotive technical applications and in particular a Zuziehantrieb, wherein the Antriebsein unit is shown without housing cover, and

FIG. 2 shows a detailed view of the flexible conductor track section contained in the drive unit. In the figure 1 electric drive unit 1 is shown in a three-dimensional representation and in the form of a Zuziehan drive for a motor vehicle lock. For receiving the drive unit 1 in the motor vehicle Hal teelemente 2 are provided, with the drive unit, for example, in a module carrier in a Kraftfahrzeugsei tentür is fastened. The drive unit 1 is connected by means of a plug 3 with a control unit, not shown, control unit. The plug 3 is part of a housin ses 4 of the drive unit 1, wherein in the figure 1 single Lich the housing shell 5 is shown.

In the housing shell 5, a spindle drive 6, a Ge gear 7, an electric motor 8, a strip conductor 9 as electrical components 10 is added. The spindle drive 6 has a spindle nut 11, the extensions via Ver 12 is in operative connection with a Bowden cable. The spindle 13 is integrally formed in this embodiment and made of plastic with a worm wheel 14 of the gear stage 7. The worm wheel 14 is in engagement with a worm 15, the wedge bridge 15 is taken on the output shaft of the electric motor 8 is taken. The electric motor 8 is inserted into the housing shell 5, wherein a plastic sheath 16, the position of the electric motor 8 in the housing shell 5 stabilized. The plastic sheath 16 also serves to hold and guide the conductor track formation 9.

The conductor track formation 9 is reproduced in an enlarged Dar position in the figure 2 in detail. To know he is in the figure 2, the conductor track 16, the the electric motor 8 partially and at least in the

Longitudinal extent encloses on both sides. The plastic casing 16 engages at least partially and on one side into a recess 17 of the motor 8. The plastic sleeve 16 carries and holds the strip conductor 9 and additionally serves as a torque arm for the motor 8. The plastic casing 16 may be formed as a separate component or as encapsulation of the strip conductor 9.

The conductor track formation 9 is on one side with Klemmkontak th into engagement, wherein the ends 20, 21 of the Leiterbahnge image 9 are inserted in clamping feet formed as a clamping contacts 18, 19. By this type of connection of the ends 20, 21 of the conductor track 9, a constructive tively simple and production-enhancing contacting of the conductor track 9 can be achieved. For example, soldering can be dispensed with.

At the ends 20, 21 of the conductor track structure are joined by free loops 22, 23. The free loops 22, 23 allow clearance compensation by means of the conductor track 9. The ends 20, 21 of the strip conductor 9 are fixedly connected to the terminal contacts 18, 19. Ande hand, the interconnect structure is provided with plug contacts 24, 25 which are 8, for example, in receiving openings 26 of the electric motor inserted. The plug contacts 24, 25 are also firmly connected to the housing 27 of the electric motor 8. The conductor track formation 9 is thus closed on the motor side as well as the housing shell side. Is it due to an interaction? the worm 15 and the worm wheel 14 and the spindle 6 drove to a movement of the electric motor 8 in the direction of arrow P, this movement of the electric motor 8 in relation to the housing shell 5 by the Leiterbahnge form 9 and in particular the free loops 22, 23 be taken up. Movements or relative movements of the motor 8 in the direction of the arrow P occur, for example, when the spindle drive 6 ge reached its end position, for example, the extensions 12 can strike an unillustrated end of the housing shell 5. In these absolute positions of the spindle drive t, the spindle drive 6 stops abruptly, so that a force is transmitted via the worm wheel to the worm 15 and thus to the electric motor 8. This force can lead to a movement of the electric motor 8, which in turn is elastically receivable by the conductor track formation 9.

On the one hand, the trace formation 9, the game between rule motor 8 and housing shell 5 record, but at the same time can be exercised by means of the conductor track 9, a force in the direction of the electric motor 9. Thus, a force F from the conductor track formation 9 to the case of play in the direction of the arrow P act, and so the Rela tivbewegung counteract in the direction of the arrow P between the motor 8 and housing. The strip structure has a stabilizing effect on the electric motor 8. Act the free loops 22, 23 resiliently in the strip formation 9, so Kings nen the bends 28, 29 in the strip structure 9 stabi lisierend act in the strip structure 9. Reference sign list

1 drive unit

2 holding elements

3 plugs

4 housing

5 housing shell

6 spindle drive

7 gears

8 electric motor

9 trace structures

10 electrical components 11 spindle nut

12 extension

13 spindle

14 worm wheel

15 snail

16 plastic jacket 17 recess

18, 19 terminal contacts

20, 21 ends

22, 23 free loops

24, 25 plug contacts

26 receiving openings

27 housing

28, 29 bends

P arrow

F force

Claims

claims

1. Electric drive unit (1) for motor vehicle technical applications, in particular a Zuziehantrieb for a motor vehicle lock, comprising a housing (4) of a housing shell (5) and at least one housing cover, an electric motor (8), wherein the electric motor (8) in Housing (4) is received, at least one with the motor (8) in engagement gear unit (7), wherein by means of the gear unit (7) a Antriebsskompo component, in particular a Bowden cable, is movable and an electrical contact for the engine, thereby characterized records that the electrical contact can be formed as flexib les strip line formation (9), so that a relative movement (P) between the motor (8) and the housin se (4) is compensated.

2. Drive unit (1) according to claim 1, characterized in that the conductor track formation (9) by means of the Ge housing (4) is durable and / or guidable.

3. Drive unit (1) according to one of claims 1 or

2, characterized in that the conductor track formation (9) directly to the motor (8) is connectable.

4. Drive unit (1) according to one of claims 1 to

3, characterized in that the conductor track formation (9) by means of a positive connection, in particular by means of clamping contacts (18, 19) is connectable to a connecting conductor.

5. Drive unit (1) according to one of claims 1 to 4, characterized in that the conductor track formation (9) at least partially with plastic (16) is coatable.

6. Drive unit according to one of claims 1 to 5, characterized in that the conductor track formation (9) has a plastic sheath (16), wherein by means of the plastic sheath (16) at least partially an engine mount is formed.

7. Drive unit according to one of claims 1 to 6, characterized in that the conductor track formation (9) has at least one free loop (22, 23).

8. Drive unit (1) according to one of claims 1 to 7, characterized in that by means of the Leiterbahnge image (9) a force (F) in the motor (8) can be introduced, so that a stabilization of the position of the motor (8) is possible.

9. Drive unit (1) according to claim 8, characterized in that by means of the plastic casing (16) is a stabilization of the motor (8), in particular a torque arm, can be formed.

10. Drive unit (1) according to one of claims 1 to 9, characterized in that the motor (8) with a spindle drive (6) is in operative connection.